sometimes our application is slowing down and we are seeing unusual gaps at the thread overview:We have seen this before caused by gc activity. But this time it must be something different.We have checked at the gc log PrintGCApplicationStoppedTime and we cannot see these gaps there.

Also we are seeing a lot of time consumption at com.yourkit.probes which we have not seen before:

Any idea what can cause these gaps and our performance problem?We are running at Java 1.7 45 and with a JBoss 5.0

The gaps indicate that the telemetry was obtained less frequently than with the default 1 second period because JVM did not let the telemetry thread run as soon as it requested. Most likely this was related with GC pauses or with CPU activity in other threads of the application.